You have a Referral link in your Etsy Theme Shop Admin, this is what it looks like:
If you know someone who is an Etsy Shop Owner, who doesn’t have an app with us; you can send them this link, and if they get the app with us, then we’ll send you a voucher to feature an item for free!
You Can also enter in “The Daily Like Bomb”, There are three Winners a day! Each of the Three Winner get a voucher to feature an item for free!
For more details be sure to Login onto your admin.